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Asclepias exaltata (Poke Milkweed)

Asclepias exaltata (Poke Milkweed)

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Pure Live Seed

Seed is provided in Pure Live Seed (PLS) unless otherwise stated.

Pure Live Seed (PLS) expresses the viable seed content of a seed lot using its purity and germination or viability test results. It helps you compare seed lots and calculate how much bulk seed is needed to meet a specified PLS planting rate.

PLS weight and bag weight

PLS weight is not the same as the total weight of seed in a bag. For example, a lot with 80% purity and 75% viability contains 60% PLS: 80 × 75 ÷ 100 = 60. Supplying 10 lb PLS from that lot requires about 16.67 lb of bulk seed.

Use the current seed test and the stated basis of the mix specification. Germination calculations may include applicable hard or dormant seed. Seed-count estimates also require the number of seeds per pound; PLS alone does not provide a seed count.

What to check when buying a mix

Check whether each rate is stated in PLS pounds, bulk pounds, or a combination. A mix with both bases should not be described as having an all-PLS total.

PLS does not remove weed seeds or guarantee establishment. Review the seed label and analysis for weed content, and match site preparation, planting conditions and follow-up management to your project.

Sources: USDA NRCS, Understanding Pure Live Seed and The Importance of Seed Quality for Natural Resource Conservation.

Weight Conversions lbs. to oz.

0.01 pounds = 0.16 ounces

  • 0.1 pounds = 1.6 ounces
  • 0.25 pounds  = 4 ounces
  • 0.5 pounds = 8 ounces
  • 0.75 pounds = 12 ounces
  • 1.00 pounds = 16 ounces

Poke milkweed is a milkweed for filtered light and richer soil. Its tall stems and pale, two-toned flowers fit a sheltered woodland edge with some protection from prevailing wind.

For Asclepias exaltata, choose partial or filtered sunlight and mesic soil. Recorded habitats include woodland openings; Rich mesic woods; Sandy woods; Rocky upland woods; Wooded slopes; Woodland margins. Reported height: 2-6 ft.

Its below-ground structure is described as taproot. Choose the permanent location with that root structure and the mature size in mind. Planning the surrounding space at planting time reduces the need to reorganize an established bed later.

Plant specifications

Key growing facts

Sunlight Partial or filtered sunlight
Soil moisture Mesic
Height 2-6 ft
Bloom season Summer
Show / hide ▾Growing & planting details
Growth habit Tall, usually unbranched perennial
Root form Taproot
Soil pH Published cultivation guidance lists acidic, neutral soil conditions; no optimal numeric interval is established.
Cultivation hardiness zones Zones 3a–7b (general cultivation guidance)
Deer browsing Deer resistance reported in cultivation guidance; browsing remains possible.
Plant toxicity Poison characteristics are reported. Pet safety is not established.

Plant identification & seed reference

Botanical name Asclepias exaltata
Other common names poke milkweed; Poke Milkweed
Plant family Asclepiadaceae
Show / hide ▾Plant communities & associates

Illinois woodland and stream communities

Middle Fork Woods, Vermilion County (1999–2002 survey). Recorded in: mesic ravine forest.

Mesic ravine forest — selected native associates: Geranium maculatum, Phlox divaricata, Asarum canadense.

These plants share a recorded habitat; they were not necessarily found in the same small plot.

Show / hide ▾Native range & C-value

State nativity describes a broad range. Use the Chicago-region assessment for local context; a state listing does not establish county nativity.

Wetland indicator — NWPL 2022 Midwest UPL
C-value — Chicago region, Flora 2017 10
Chicago-region native — Flora 2017 Yes
Native range — U.S. states Alabama; Connecticut; Delaware; Georgia; Illinois; Indiana; Iowa; Kentucky; Maine; Maryland; Massachusetts; Michigan; Minnesota; Missouri; New Hampshire; New Jersey; New York; North Carolina; Ohio; Pennsylvania; Rhode Island; South Carolina; Tennessee; Vermont; Virginia; West Virginia; Wisconsin
County nativity Not yet verified; occurrence records do not establish nativity.
Show / hide ▾Pollinators & wildlife

Caterpillars & other plant-feeding insects

This plant has published caterpillar host records for the butterflies and moths listed below. These are larval feeding relationships, separate from adult nectar visits. The records span a North American literature compilation and do not establish that every insect occurs locally or uses only this plant.

Moths

  • Euchaetes egle — Milkweed Tussock Moth or Milkweed Tiger Moth
Show / hide ▾Frequently asked questions

What are the ideal growing conditions for Poke Milkweed?
Light: Partial or filtered sunlight. Soil moisture: Mesic.

Is Poke Milkweed deer and herbivore resistant?
Deer resistance reported in cultivation guidance; browsing remains possible. Even plants described as resistant may be browsed. Use physical protection where deer damage is a concern.

When should I expect Poke Milkweed to bloom?
Typical flowering period: Summer. Timing varies with location and weather.

Show / hide ▾Sources & ecological notes

Native landscaping evidence: These planting suggestions draw on published growing requirements, mature form and spread. Placement and maintenance advice reflects landscape design judgment using these sources: Asclepias exaltata; Thalictrum dasycarpum; Campanula americana.

Illinois woodland records: Larimore, Phillippe & Ebinger (2008), Middle Fork Woods flora, Appendix I. © 2008 University of Illinois Board of Trustees, CC BY 4.0. Habitat records transcribed, selected and linked to catalog names by Natural Communities. Survey: 1999–2002.

Native range & ecological ratings: Flora of the Chicago Region (2017), via Universal FQA; USACE Chicago FQA (2017); Kew WCVP / Plants of the World Online; USACE National Wetland Plant List.

Growing conditions & other references: Illinois Wildflowers, John Hilty; NC State Extension Plant Toolbox.

Wildlife records: Shropshire & Tallamy: caterpillar hosts (2025).

Native range does not identify the origin of the seed or plants offered. Community and wildlife records apply to the locations and conditions described.

Research notes & credits

USACE/ERDC fqadata — Chicago Region FQA 2017. Herman, B., Sliwinski, R. & Whitaker, S. (2017), Chicago Region FQA Calculator; distributed by USACE/ERDC in fqadata under CC0. Values may differ from Flora of the Chicago Region (2017). CC0 dedication. Retained for comparison; the displayed C-value follows Flora database 80.

Range data: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew; 4 June 2026 release, accessed 7 September 2026. © The Trustees of the Royal Botanic Gardens, Kew. CC BY 3.0; selected and reformatted. Kew cannot warrant the quality or accuracy of these data. This use has no Kew endorsement.

Caterpillar host records: Shropshire, K.J. & Tallamy, D.W. (2025), Lepidoptera of North America, Supplement 1. Contains information from this database made available under the Open Database License (ODbL 1.0). Natural Communities selected species-level records and screened source qualifications. The complete selection and transformation instructions for this page are available below under the same license.

Flora rating attribution: Kenneth Johnson (2018), Flora of the Chicago Region UFQA Database, following Gerould Wilhelm and Laura Rericha (2017), Flora of the Chicago Region: A Floristic and Ecological Synthesis. Individual rating facts are presented with original commentary; the calculator’s software license is not treated as a license for the underlying Flora publication.

Caterpillar research records

Plant: Asclepias exaltata

Record scope: Host literature synthesis; no county nativity or local insect occurrence inferred.

Shropshire & Tallamy (2025) · Original research dataset · Reuse license: ODbL-1.0

Plant names in the source Source insect record IDs
Asclepias exaltata 205052

How these records were selected

To reproduce this selection, use the “UDELep May 2025” worksheet in the original research dataset.

  1. Match the insect record IDs above to column A (UDLepID). Within each table row, pair every listed insect ID with every listed source plant name.
  2. Use the first two words in column H for the insect’s scientific name, column E for its common name, and column AB for its source category.
  3. Treat the selected pairs as reported caterpillar host records. Keep all other source fields unchanged and outside this selected table. Include no other rows or host pairs.
  4. Group butterflies and skippers together, and the other categories as moths. Retain the source’s exotic-category labels and sort display names by scientific insect name.

Growing guidance: Illinois Extension — Keeping deer out of the yard and garden. Selected facts in original wording. General deer advice is not a species resistance rating.

Planting references and review

Reviewed: 2026-09-26

Plant spacing:Species-specific spacing needs review. Select a spacing suited to your site and planting design.

Seeding rate: Use a site- and method-specific specification. No verified automatic species rate is supplied.

Seed preparation: A species-specific preparation method and named code system need confirmation for the supplied seed lot.

Seed Shipping & Care

Seed ships all year and typically ships within a week of an order being placed.

We have attempted to put together some basic information regarding native seed installation, establishment, and maintenance.  We hope you find it helpful.  If you need further assistance on native seed establishment, please schedule a free consolation call here.

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